Pencil



- J. P, LYNN PENCIL Filed Aug. 24, 1928 Patented Apr. 7,1931 I 1 UNITED STATES PATENT OFFICE JOHN P. LYNN, OF CHICAGO, ILLINOIS, ASSIGNOR '10 DUR-O-LITE PENCIL (10., 1'

CHICAGO, ILLINOIS, A CORPORATION 01 ILLINOIS IPENOIL Applicationflled August 24, 1928. Serial No. 301,718.

This invention which relates generally to tip B. The walls of this tube are frictionally mechanical pencils, or other implements of engaged with the lining of the chamber 12 so similar character, is concerned primarily as to establish a rotatable connection between with certain improvements in the constructhe tip and encil body. Extending axially tion of the bodies therefor, particularly such within the tip is a guide tube and such other 5 as are produced from a material that is parts as are needful t0 coo erate with the moulded to shape under heat and pressure. plunger 11 to efiect propulsion through the With a body that is moulded in a two-part tip 0 an active lead C. die difliculty is frequently encountered in A encil body which is produced by a fusing or otherwise uniting the complemoul ing process may comprise two com le- 50 mentary body sections whether they be promenta halves w and 3 (see Fig. 2) whic if duced individually or in biscuits. The perfect y constructed, are. fused together losses resulting from imperfect union may along their longitudinal meeting surfaces 2. amount to considerable in commercial .prac- The occasional imperfect joining of the body tice". The aim of this invention is to provide sections renders. desirable a supplemental 65' a means which assists in joining the compleconnection and this is provided mechanically mentary sections of such a body and which according to my invention. For this purin case of little or no bond resulting from pose, I utilize the lining 14 at one point and incomplete fusion will nevertheless provide optionally elsewhere another lining of a mechanical union permitting the unresimilar form. In the. construction ,hown, 7o stricted use of the body the same as though this latter liningis fitted withina c amber its-parts were joined by a perfect union. extending axially of the body from its upper A suggestive embodiment of my invention and for a distance suflicient to provide a mag- 's set forth'in the accompanying drawing wine for reserve leads. The two linings, as i wherein-' shown, occupy positions at opposite ends of 75. Figure I is a longitudinal section through the pencil body, but this is not a point of cona mechanical 'pencilaof' conventional consequence in the present invention. struction, a portion of; the body thereof Each lining is in the form of a sleeve havb in shown i l tion mg a plurality of parallel slots 16 cut into its '30 Figs. 2 and 3 are enlargedtransverse secwalls from one end thereof. In producing 80 tions therethrough taken respectively on these slots the displaced material which is in li 2 2 d 3L3 f Fi v1; the form of narrow strips is rolled or curled Fig. 4' is an end elevation of the body linqk, preferably into the form of eyes 17 ing per se; and v Wl'llCh are dLspoSed'ad acent the inner ends 3 Fig. 5 is a side l vation th reof. of the slots and upon the outer face of the li'n- 85 Th il h eiwflm tr t d b way f mg. LHllIlgS of this character are carried by xa pl o pris a: b dy A ha ing, if 1 the mandrels which occupy positions between i d, t it upper d a frr ile 6,, i hi h the dle moulds when the fusible material is i held an ser 7 p tected b cap 8 heated and pressed therebetween in the procwhich is fitted thereon. Fitt'ed to the lower {3350f p ng the od s h s materia pencil end isagone-shaped tipBhaving aro 18 caused to flow through the slots 16 and tatable connection therewith. eyes 17 so as to become interlocked therewith The pencil body is shown as provided with irrespective of any union resulting from an axial opening 9 havin one or'more slots fuslonbetween the two body sections. Betherein for the accommo ation of a head 10 cause of the axial positions of the linings and 95 which is carriedon a threaded plunger 11. At the projection of its eyes into the several body its lower end the passage 9 opens into a round sections, a mechanical interconnection is aschamber 12 of enlarged diameter wherein is sured such that separation thereof is positive-- fitted a lining 14 which receives engagement 1y prevented. The losses attendant upon the from a tube 13 exten-ding upwardly from the commercial manufacture of bodies in which 0 such interlocking linings are employed are reduced to less than one per cent. Suchlinings are also advantageous in that they reinforce the body walls throughout their thin.- nest portions, and in the case of the lining at the lower body end, a more accurate and'unlform surface is presented to the tube 13 which engages'frictionally and rotatably therewith.

My invention is susceptible of use with many forms of moulded bodies comprising two or more complementary sections which in the fusing operation are joined physically, and b reason of the supplementary mechanical finterconnection which is provided a stronger and more durable product is assured.

1. A moulded body for pencils and the like formed of longitudinally complementary physically joined sections between which is an axial opening, and a lining with in the opening havlng slotted walls and having projecting means embedded within the several sections to effect a mechanical union therebetween, substantially as described.

2. A moulded ,body for pencils and the like formed of a plurality of sections and having a longitudinal opening, said sections being joined along longitudinal planes, and having means extending from one section to the next ad'acent section and ermanently secured to bot sections for bon ing said sections together.

3. A moulded body for pencils and the like formed of a plurality of sections and having a longitudinal o ening,sai'd sections being fused along longitudinal planes, and having means extending from one section to the next adjacent section and permanently secured to 0th sections for bonding said'sections together. 7

4a. A moulded body for pencils and the like formed of a plurality of sections and having a longitudinal opening, said sections b m joined along longitudinal planes, and a h ing for said opening having means thereon for engaging said sections to hold them as" sembled.

5. A moulded body for pencils and the like formed of a plurality of sections and having a longitudinal opening, said sections being joined along longitudinal planes, and a lining for said opening havin outwardly struck portions for engaging said sections to hold them assembled.

6. A moulded body for pencils and the like formed of a plurality of sections and having a lon 'tudinal opening, said sections being joine alongdongitudinal planes, and a lining for said 0 ening having outwardly struck portions orming eyes for engaging said sections to hold them assembled.

7. A moulded body for pencils and the like formed of a plurality of sections and having a longitudinal opening, said sections being oined along longitudinal planes, and a tubular metal lining having a plurality of longitudinal slots formed in one end thereof, some of the metal removed to form said slots being bent outwardly to form eyes which are adapted to engage said sections to hold them assembled.

8. A reinforcing member for use in encils and the like comprisin a metal tube aving a plurality of longitudinal slots formed in one end thereof, some of the metal dis laced to form said slot being bent outwardly to form eyes.

9. A reinforcing member for use in encils and the like comprising a metal tube aving a plurality of eyes struck outwardly therefrom.

In testimon whereof, I have hereunto set my hand t 1s 22 day of August, 1928. OHN P. LYNN. 

